A passenger from a Saudi Arabian Airlines flight from Jeddah walks by demonstrators as she arrives at Dulles International Airport in Virginia on Jan. 29. Protests erupted at airports around the country following President Donald’s Trump's executive order on immigration. (Bill Clark/CQ Roll Call/Pool)

The White House has spent the last few days defending President Donald Trump’s executive order that temporarily halted the entry of nationals from seven primarily Muslim countries and suspended the intake of all refugees. Roll Call examined how many people this could affect, and how lawmakers are responding.